4tH is a Forth compiler with a little difference. Instead of the standard Forth engine it features a
conventional compiler. 4tH is a very small compiler that can create bytecode, C-embeddable bytecode, standalone executables, but also works fine as a scripting language. It supports about 95% of the ANS Forth CORE wordset and features conditional compilation, pipes, files, assertions, forward declarations, enumerations, structures, suspended execution, recursion, include files, etc. It comes with an RPN calculator, line editor, preprocessor, compiler, decompiler, C-source generator, a virtual machine, and a multitasking environment.

AMC is a programmable compiler/preprocessor. It has a built-in programming language called CGL (Code Generation Language) that lets you add new syntactical elements to the source files that AMC processes. In addition, AMC has a module structure reminescent of the UCSD p-System compiler. AMC comes with a default package that adds a dynamic form of OOP to C.

The AMD x86 Open64 Compiler Suite is derived from sources at Open64.net and has been optimized for the x86, AMD64, and Intel64 architectures. The suite includes C, C++, and Fortran compilers with advanced optimizations.

ANTLR (ANother Tool for Language Recognition) is a language tool that provides a framework for constructing recognizers, compilers, and translators from grammatical descriptions containing C++, Java, or Sather actions. It is similar to the popular compiler generator YACC, however ANTLR is much more powerful and easy to use. ANTLR-produced parsers are not only highly efficient, but are both human-readable and human-debuggable (especially with the interactive ParseView debugging tool). ANTLR can generate parsers, lexers, and tree-parsers in either C++, Java, or Sather. ANTLR is currently written in Java.

ATG Dynamo integration for JBuilder is a JBuilder
5 plugin that makes it easy to deploy J2EE
applications to the ATG Dynamo Application Server
version 5.1 (DAS). It can be installed and run
with the other JBuilder 5 plugins such as BEA
WebLogicServer 5.1, BEA WLS 6, IBM WebSphere 3.5,
Borland AS 4.5, etc.

AVR-Ada aims to make the Ada part of gcc usable on
AVR microcontrollers. This includes the three
elements: the Ada compiler, the Ada run time
system, and the AVR support library. Some sample
programs are provided as well.